Matthew Charles “Matt” Mullenweg (born January 11, 1984 in Houston, Texas) is an American online social media entrepreneur, web developer and musician living in San Francisco, California. He is best known for developing the free and open source web software WordPress, now managed by The WordPress Foundation.

Mullenweg attended the University of Houston and majored in Political Science before he dropped out in 2004 to pursue a job at CNET Networks. In late 2005, he quit his job at CNET Networks and founded Automattic, the business behind WordPress.com (which provides free WordPress blogs and other services), Akismet, Gravatar, VaultPress, IntenseDebate, Polldaddy, and more. His professional blog is ma.tt, a domain hack.

Since 2005 Mullenweg has been a frequent keynote/speaker at conferences/events, including Canada’s Northern Voice, global WordCamp events, SxSW, BlogWorld Expo, Greek Blogger Camp, Yahoo TechDev Talk, Web 2.0 Submit, YCombinator’s Startup School, Le Web, etc.

Mullenweg attended the High School for the Performing and Visual Arts where he studied jazz saxophone. Mullenweg is also a Dvorak Keyboard user and can type over 120wpm.